From: Daniel Lee Kruse Date: Wed, 30 Sep 2020 03:36:35 +0000 (+0200) Subject: media: cx23885: add more quirks for reset DMA on some AMD IOMMU X-Git-Tag: v4.19.180~6 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2397bcc7cbe8bed08157b697c929e5967d13cb71;p=thirdparty%2Fkernel%2Fstable.git media: cx23885: add more quirks for reset DMA on some AMD IOMMU [ Upstream commit dbf0b3a7b719eb3f72cb53c2ce7d34a012a9c261 ] On AMD Family 15h (Models 30h-3fh), I/O Memory Management Unit RiSC engine sometimes stalls, requiring a reset. As result, MythTV and w-scan won't scan channels on the AMD Kaveri APU with the Hauppauge QuadHD TV tuner card. For the solution I added the Input/Output Memory Management Unit's PCI Identity of 0x1423 to the broken_dev_id[] array, which is used by a quirks logic meant to fix similar problems with other AMD chipsets. Signed-off-by: Daniel Lee Kruse Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c index fd5c52b21436b..a1d738969d7b1 100644 --- a/drivers/media/pci/cx23885/cx23885-core.c +++ b/drivers/media/pci/cx23885/cx23885-core.c @@ -2084,6 +2084,10 @@ static struct { * 0x1451 is PCI ID for the IOMMU found on Ryzen */ { PCI_VENDOR_ID_AMD, 0x1451 }, + /* According to sudo lspci -nn, + * 0x1423 is the PCI ID for the IOMMU found on Kaveri + */ + { PCI_VENDOR_ID_AMD, 0x1423 }, }; static bool cx23885_does_need_dma_reset(void)